
6.1 Opening the drive side base
• Uncouple the pump by removing the coupling sleeve.
• Loosen the 4 screws
410
and the 2 screws
411
and
place them in the 2 tapped holes T.
• Detach the cover of the cylinder by screwing the 2
screws
411
at the same time.
• Withdraw the front cover
401
in such a way as to relea-
se the rotor
301
from a little more than half of the pump
body
101
.
• Hold the vanes
317
in place by means of suitable straps
(elastic, bracelets...).
• Place the front cover-rotor assembly on a bench, remove
the straps and the vanes.
• Check the seal
403
.
6.2 Dismantling the vanes and pushrods
• Place the front cover
401
and rotor
301
assembly on a
bench.
• Remove the straps and the vanes
317
.
• Pull out the pushrods
318
by pushing them, if necessary,
with a screwdriver.
• Check the pushrods
318
for wear (see § MAINTENANCE)
and change them as necessary.
• Pull out the rotor
301
.
• Remove the keyways
536
.
• Check the wear of the keyways and of the 2 keys
536
.
The wearing carbon disks 422 are only positioned in the
covers, take care not to drop them when the rotor is being
removed.
Elastic
Elastic
CAUTION
23/45
NT 1008-D00 08 18 P BI series e
6. OPENING AND CLOSING THE DRIVE SIDE BASE
(continued)